Timed food-filled toy dispenser

ABSTRACT

A dispensing system ( 200 ) for chewable pet toys ( 100 ) contains multiple toys and dispenses them at intervals determined by one or more modes of operation. A display ( 220 ) and keypad ( 400 ) are used to enter programming data into the memory of a microprocessor ( 315 ). When the system is in operation, the display indicates progress through the program, the mode of operation whether MANUAL, RANDOM, or BMOD (behavior modification), the time elapsed, and the number of toys remaining. At various times, sounds emanate from a loudspeaker ( 320 ), vibration emanates from a vibrator ( 328 ), light emanates from a light source ( 325 ), and odor emanates from an odor generator ( 327 ). Toys are dispensed down a ramp ( 225 ), at predetermined times, or at predetermined times modified by random numbers. Predetermined dispensations permit modification of the pet&#39;s behavior (BMOD). Random variations on a predetermined schedule of dispensations (RANDOM) prevent the pet from memorizing a schedule. Multiple, simultaneous dispensations or jackpots reward the pet and maintain the pet&#39;s level of interest in the dispensing system. The various stimuli along with the dispensing-time modes prevent habituation and keep the pet interested, contented, and stimulated.

FEDERALLY SPONSORED RESEARCH—NONE SEQUENCE LISTING—NONE BACKGROUND

1. Field of Invention

This invention relates to pet toy dispensers, in particular those whichdispense toys containing food and otherwise amuse and alert a pet byproviding various physical stimuli.

2. Prior Art—Challenging and Automated Feeding Systems

When left alone, animals frequently become discontented, bored, andhungry. This is cruel to the animals and leads to behavior problems suchas barking, digging, and destructive activities on the part of caninesand different problems with other animals. Some prior-art schemes haveaddressed the problem of unattended feeding of animals.

Hamilton, in U.S. Pat. No. 5,894,815 (1999), shows a boredom-reducingfeeding device for caged animals comprising various food-sequesteringdevices, such as a brush and a dipstick-tube. Hamilton's device presentsvarious challenges to a caged animal such as a primate, but does notdelay or space feedings, as is desirable for pets.

Riba, in U.S. Pat. No. 3,874,341 (1975), shows a machine for feeding apet when the owner is absent. An alarm clock is used to open a door andeject a platform with a pet dish. Only a single feeding event occurswhile the owner is absent.

Mazzini, in U.S. Pat. No. 3,946,702 (1976) shows a periodic feeder witha series of rotatable compartments for dispensing the food as thecompartments rotate past a hole. Mazzini's system provides moreopportunities for feeding than Riba, but it does not address the issueof stress experienced by the animal when it is left alone.

While providing food is desirable, this alone does not provide adequatecare for a pet. Riba and Mazzini both teach food-dispensing events thatoccur at fixed intervals, either with respect to the last event or withrespect to the time of day. This allows the animal to become habituatedto the feeding event, and thus the automatic feeders do not reduceboredom between events nor provide any relief for a pet's separationanxiety.

Watson, in U.S. Pat. No. 6,273,027 (2001) shows an automatic trainingdevice that dispenses food, toys, or other rewards, typically on a fixedtime interval as long as undesired behavior is not detected. Ifundesired behavior, such as barking, is detected, rewards are withhelduntil the undesired behavior is no longer detected. This device can beeffective for targeting specific undesired behaviors but requires theincorporation of behavior detectors, which can be complex, expensive,and overly specific.

In addition, Watson's device may automatically adjust the time intervalbetween regular reward dispensations for the purpose of rationing theavailable rewards over a given overall time period. This adjustment tothe time interval is not designed to increase the pet's interest in thedevice nor relieve the pet's anxiety at the beginning or the end of thepet owner's absence, when behavior problems for the isolated pet are themost severe.

BACKGROUND—Prior-Art—Food-Filled Toys—FIG. 1

Pet chew toys that may be filled with food to be extracted by the petare well known. Examples of these chew toys are sold under thetrademarks Kong by Bounce, Inc. of Golden, Colo., USA, and Rhino byNylabone, a division of T.F.H. Publications of Neptune City, N. J., USA.Such a toy is also shown in U.S. Pat. Nos. 5,947,061 (1999) and U.S.Pat. No. 6,129,053 (2000) to Markham et al. This toy has variousrecesses in its outer surface, as well as a hollow interior. Food treatsare deposited in the recesses and interior. Various levels of difficultyin removing the treats are achieved, depending upon the location,density, solubility, adhesion, and so forth, of the food treats and theshape of toy.

A cross-sectional view of one embodiment of the Kong toy is shown inFIG. 1. The body of toy 100 is made of a rugged, semi-elastic material,such as rubber. It is hollow with a first hole 105 at one end (bottomend in drawing) and a second hole 110 at the other end (top end indrawing). The hardness of the rubber comprising toy 100 is about 100durometer units. A dog's bite can slightly deform toy 100, but notflatten it. Toy 100 is available in various sizes suitable for dogs ofdifferent sizes. A typical size is 14 cm long and 8 cm in diameter, atthe widest point. The wall thickness is typically 1.5 cm. The diameterof hole 105 at the bottom of toy 100 is typically 1 cm, while thediameter of hole 110 at the top is typically 3.2 cm.

Food 130 of various kinds is stuffed into cavity 140 of toy 100. Food130 can be dry or wet dog food, fruits, cheese, meat, eggs, peanutbutter, and the like. It can be hot, cold, or frozen.

Hole 110 is the primary entrance and exit for food 130. An “appetizer”tidbit 160 (shaped like a bone) projects from hole 110 to entice the dogto begin eating the contents of toy 100.

Food-filled pet chew toys are frequently used to distract and entertainpets prior to an extended absence. The pet's owner typically fills thetoy with food and hands the toy to the pet prior to the owner'sdeparture. This is effective in keeping a pet's interest for up to anhour in extracting the food from the chew toy. However, once the food isextracted the remaining time of the pet's isolation is withoutentertaining stimulation. In the case of a ten-hour absence, as may beexpected when a pet owner leaves for work in the morning, thistranslates to a nine-hour isolation with no entertaining stimulation.

BACKGROUND—Objects and Advantages

Accordingly, several objects and advantages of the invention are toprovide an improved system for feeding a pet, to alleviate boredom, andto reduce stress for the pet while the pet's owner is absent, includingthe times at the beginning and at the end of an owner's absence when anisolated pet's anxiety is often the highest. Other objects are toprovide a system that amuses and entertains the pet by dispensing toys,providing auditory, visual, tactile, and olfactory stimuli at variousrandom intervals to prevent habituation to any one event, or atpredetermined intervals biased to reduce separation anxiety withoutrequiring the use of behavior detectors.

Further objects and advantages will become apparent from a considerationof the ensuing description and the accompanying drawings.

SUMMARY

In accordance with the invention, an apparatus and method are providedwhich dispense food-filled toys at random, unpredictable intervals or atbiased predetermined intervals. Within a selected set of random intervaldispensations, jackpots, or multiple dispensations of food-filled toys,can occasionally occur at a single dispensation event to furtherreinforce the pet's interest in the device. Predetermined intervals arebiased such that the dispensations occur more frequently after the ownerleaves and before the owner returns, when a pet's separation anxiety isthe highest. In addition, the system emits sounds, odors, vibrations,and visible signals at random intervals or at predetermined intervals inconjunction with food-filled toy dispensation.

DRAWINGS—FIGURES

FIG. 1 is a cross-sectional view of a prior-art toy stuffed with food.

FIG. 2 is a perspective view of a feeding and entertainment systemaccording to the present invention, with a closed lid.

Fig. 3 is a perspective view of the system of FIG. 2 with the lid open.

FIGS. 4 through 9 show the display and keypad of the system of FIG. 2 atvarious stages of data entry.

FIG. 10 shows the display of the system of FIG. 2 at one time duringoperation.

FIGS. 11A through 11D are a flowchart showing the process of enteringdata and running the system of FIG. 2.

DRAWINGS-Reference Numerals 100 Toy 105 Hole 110 Hole 130 Food 140Cavity 160 Appetizer 200 Dispensing system 205 Lid 210 Thumbscrews 215Frame 220 Display 221 Cut-out portion 225 Ramp 300 Threaded shaft 305Battery power pack 310 Power switch 315 Microprocessor 320 Loudspeaker324 Motor 325 Light source 327 Odor generator 328 Vibrator 330 Tray 331Tray 332 Tray 333 Tray 334 Tray 335 Tray 340 Conveyor belt 345 Pulley350 Pulley 400 Keypad 405 Key 410 Key 415 Key 420 Key

DETAILED DESCRIPTION—PREFERRED EMBODIMENT—DISPENSING APPARATUS—FIGS. 2AND 3

FIG. 2 shows a perspective view of a dispensing system 200 according tothe invention ready for use. System 200 is covered by a lid 205 which issecured in place by two hand-turned thumbscrews 210 (only one is visiblein this view), and is secured to a frame 215, partially visible in thisview. An alphanumeric display 220 is visible through a cutout portion221 of lid 205. Food-filled chew toys 100 through 100″″′ (FIG. 3) aredispensed from within system 200 by rolling or tumbling down a ramp 225,as explained below. System 200 is preferably 41 cm wide, 46 cm deep, and30 cm high.

FIG. 3 shows a perspective view of system 200 with lid 205 open.Threaded shafts 300 (only one is visible in this view) normally hold lid205 in the closed position, when engaged by thumbscrews 210 (FIG. 2).System 200 contains a battery power pack 305, typically containing four“C”-size batteries (not shown). When power switch 310 is in the “ON”position, power pack 305 energizes a microprocessor 315, display 220, aloudspeaker 320, a motor 324, a light source 325, an odor generator 327,and a vibrator 328. A keypad 400 with buttons or keys 405 (SCROLL UP),410 (SCROLL DOWN), 415 (ENTER), and 420 (START) communicates between theuser (not shown) and microprocessor 315.

Microprocessor 315 contains a program (described below) with timersoftware and instructions for selectively activating all elements insystem 200.

Food-filled chew toys 100 through 100″″′ rest on trays 330 through 335.Trays 330-335 are attached to and supported by conveyor belt 340. Belt340 passes over pulleys 345 and 350. Motor 325 causes belt 340 to moveover pulleys 345 and 350. Each toy 100 may be approximately 14 cm longand 8 cm in diameter and may contain approximately {fraction (1/16)}liter of food for a typical medium-size dog of 20 kg. Of course the sizeand internal volume of the toy 100 should be modified for larger orsmaller pets.

Operation—Preferred Embodiment—FIGS. 4 through 11D

When the system is energized, instructions (described below) are enteredinto the memory (not shown) of microprocessor 315 by pressing keys 405(SCROLL UP), 410 (SCROLL DOWN), 415 (ENTER), and 420 (START) on keypad400. During entry of instructions, programming (described below) inmicroprocessor 315 causes its responses to these keystrokes to bedisplayed on display 220. These instructions enable and modify variouscommands stored in the memory of microprocessor 315. Pressing key 405(SCROLL UP) causes display 220 to scroll upward through various options.Pressing key 410 (SCROLL DOWN) causes display 220 to scroll downwardthrough various options. In the presently preferred embodiment, thethree timing options available are “MANUAL”, “RANDOM”, and “BMOD”(described below). If RANDOM is displayed and the user wishes to selectMANUAL, then the user presses key 405 (SCROLL UP) once and display 220shows MANUAL. If instead user had pressed key 410 (SCROLL DOWN) twice,the selection MANUAL would still appear, and so forth.

Acting upon commands from microprocessor 315 (FIG. 3), motor 325 movesbelt 340, display 220 changes, loudspeaker 320 emits sounds, lightsource 325 emits light, odor generator 327 emits odors, and vibrator 328vibrates. In addition, programming in microprocessor 315 determines thetimes at which these various events occur. The times are selected fromamong three timing modes, which are as follows:

Description of the Timing Modes

Random—In the RANDOM mode, the user chooses the total number of toys 100to be dispensed and the time period over which the total number of toys100 will be dispensed. The program stored in the memory ofmicroprocessor 315 automatically causes motor 325 to advance belt 340the width of one tray 330-335 at random times throughout a selected timeperiod, dispensing one toy 100 per event. At certain dispensationevents, the program stored in the memory of microprocessor 315automatically causes motor 325 to advance belt 340 the width of twotrays 330-335, dispensing two toys 100 to provide a jackpot.

The RANDOM timing mode is used because the animal will stay interestedin the long term if it can not memorize a pattern of dispensation oftoys 100. A pet's interest is further maintained by occasionallyproviding a jackpot of two toys 100 dispensed at a single dispensationevent.

Behavior Modification (BMOD)—In the BMOD mode, the number of toys 100 ispreset at six. The user selects a time period between 4 hours (4:00) and9 hours 50 minutes (9:50). The program stored in the memory ofmicroprocessor 315 causes system 200 to dispense toys 100 according tothe schedule in Table I. Times are measured after the user presses key415 (START).

TABLE I TOY DISPENSED TIME OF DISPENSING Toy #1 (100) 10 minutes afterSTART key 415 is pressed Toy #2 (100′) 40 minutes after START key 415 ispressed Toy #3 (100″) 100 minutes after START key 415 is pressed Toy #4(100′″) 100 minutes prior to end of time period Toy #5 (100″″) 40minutes prior to end of time period Toy #6 (100″″′) 10 minutes prior toend of time period

Many behavior problems occur shortly after a separation (e.g., the pet'sowner leaves for work), and shortly before an expected return (e.g., thepet's owner returns from work). This mode distributes toys 100 at theseintervals to ameliorate such problems.

Manual—In the MANUAL mode, the user selects the number of toys 100 andthe time delay for the dispensing of each toy 100. For example, the usermay choose to dispense six total toys 100 according to the schedule inTable II.

TABLE II TOY DISPENSED TIME OF DISPENSING Toy #1 (100) 1 hour 10 minutesafter START key 415 is pressed Toy #2 (100′) 2 hours 40 minutes afterSTART key 415 is pressed Toy #3 (100″) 3 hours 0 minutes after START key415 is pressed Toy #4 (100′″) 4 hours 50 minutes after START key 415 ispressed Toy #5 (100″″) 5 hours 20 minutes after START key 415 is pressedToy #6 (100″″′) 6 hours 30 minutes after START key 415 is pressed

Considerations for the Pet Owner in Selecting a Timing Mode

If the goal of the owner is to feed and entertain a pet throughout anextended absence, and the pet either exhibits few behavior problems orbehavior problems which are not characteristically exhibited at thebeginning or end of an owner absence, the RANDOM mode should beselected. The RANDOM mode dispenses toys dispersed over an overall timeperiod, but at unpredictable intervals that reinforce a pet's interestby variable reinforcement. The RANDOM mode also incorporates theoccasional multiple dispensation, or “Jackpot” to further reinforceinterest. This variable reinforcement works to capture a pet's interestmuch as slot machines capture human interest.

If the owner finds that a pet exhibits separation related behaviorproblems, such as barking, scratching, and inappropriate soiling, thenthe BMOD (Behavior Modification) mode should be selected. Separationrelated behavior problems typically occur at the beginning and the endof an owner absence, and these are the periods that the BMOD modedispenses toys 100. These toy 100 dispensations can serve to distractthe pet with non-destructive entertainment at the times of peak anxiety.

If the owner would like dispensations to occur at specific times duringa day, for example 3:05 PM, then the MANUAL mode should be used. TheMANUAL mode is useful to schedule dispensations for specific times whenexternal events occur which may disturb or excite a pet, such as theknown arrival of a delivery person or a scheduled (and noisy) garbagepickup. The MANUAL mode is also useful to arrange the repeatedsimultaneous dispensing of multiple toys 100, as in the case in which itis desired to dispense two toys 100 at three selected times for thepurpose of providing sufficient toys for a two-dog household.

Operation of Keypad 400 and Display 220—Entry of Instructions—FIGS. 5Through 9

When system 200 is first energized, the program in microprocessor 315presents the user with a selection and a choice. “RANDOM”, for randomtiming mode, is displayed. This is the “main screen”, or starting pointof the program. The user can press START key 420 to begin execution of apreviously established program sequence. Alternatively, the user canpress ENTER key 415 to cause the program in the memory of microprocessor315 to edit the program sequence.

Selecting the timing mode—FIG. 5—To edit the program sequence, the userpresses ENTER key 415. Then the user presses up-arrow or down-arrowkeys, 405 and 410 respectively, to select the desired timing mode,RANDOM, BMOD, or MANUAL. When the desired timing mode is shown ondisplay 220, the user presses ENTER key 415. In the present example,RANDOM has been selected.

Selecting the number of toys to be dispensed—FIG. 6—Display 220 nowshows the timing mode, RANDOM, and the number of toys 100 to bedispensed. Up and down-arrow keys 405 and 410 are pressed, causingdisplay 220 to increment and decrement the value shown adjacent “# TOYS”shown on display 220. Numbers between 1 and 6 can be selected. Ifup-arrow key 405 is pressed when # TOYS equals 6, then # TOYS rolls overto 1. Similarly, if down-arrow key 410 is pressed when # TOYS equals 1,then # TOYS rolls over to 6. Once the desired number of toys 100 isdisplayed, the user presses ENTER key 415. The number of toys 100 to bedispensed in MANUAL mode is selected with the same method as in RANDOMmode.

In the BMOD mode, only six toys 100 are allowed. If the user haspreviously selected BMOD, # TOYS is automatically set to 6, loudspeaker320 beeps twice, and the user is prompted to enter a time period.

Selecting the time period for RANDOM and BMOD modes—FIG. 7—After theselection of timing mode and number of toys 100 to be dispensed, display220 then shows a time period over which the toys 100 are to bedispensed.

When the RANDOM mode has been selected, time periods from one hour(1:00) to 9 hours 50 minutes (9:50) are available. When BMOD has beenselected, time periods from 4 hours (4:00) to 9 hours 50 minutes (9:50)are available.

The user presses up and down-arrow keys 405 and 410 to select thedesired time period. When the desired time period is shown on display220, the user presses ENTER key 415 once to accept it.

Selecting the time period for MANUAL mode—FIGS. 8 and 9—After the MANUALtiming mode and number of toys 100 are selected, display 220 appears asshown in FIG. 8. The time indication shows the delay between thepressing of START key 420 and dispensing of the first toy 100. The delaytime is adjusted by pressing up and down-arrow keys 405 and 410, andselected by pressing ENTER key 415 once.

After ENTER key 415 has been pressed, display 220 updates to show thetime indication for toy 100′. The delay time for toy 100′ is the timedelay between dispensing of toy 100′ and the pressing of the START key420, and is selected as above. The process is continued until times havebeen selected for all toys to be dispensed.

Monitoring the progress through the selected settings—FIG. 10—Lid 205(FIG. 2) is closed while system 200 is operating. Cut out portion 221 inlid 205 allows the user to view progress through the various selectionson display 220.

An example of a progress indication on display 220 is shown in FIG. 10.The timing mode is RANDOM, the # TOYS is five, the elapsed TIME from thestart of the program is six hours, and the number of TOYS LEFT todispense is two.

After all toys are dispensed, or if there has been an error inoperation, display 220 will return to the original main screen.

Program Flow Chart—FIGS. 11A Through D—Setting up System 200 for RANDOMMode Operation.

When system 200 (FIG. 3) is energized, the program in microprocessor 315begins at BEGIN (block 1100, FIG. 11A). After starting, the programautomatically enters the RANDOM mode of operation (block 1105). Then theprogram waits for a keystroke (block 1110). When a keystroke on keypad400 is detected, the program checks to see which of keys 405 through 420was pressed. If START key 420 was pressed (block 1115), the previouslystored program is run (block 1120). If up-arrow key 405 was pressed(block 1125), then the program enters the next mode of operation (e.g.MANUAL) (block 1130) and displays “MANUAL” on display 220 (block 1135).If down-arrow key 410 was pressed (block 1140), then the program entersthe prior mode of operation (e.g. BMOD) (block 1145) and displays “BMOD”on display 220 (block 1150). In this example, up and down-arrow keys 405and 410 are pressed until the RANDOM mode of operation is displayed.

When ENTER key 415 is pressed (block 1155), the program remains in theRANDOM mode of operation and waits for the next keystroke. If akeystroke is detected (block 1110), but none of keys 405 through 420 waspressed, an error condition exists (block 1160) and the program returnsto BEGIN (1100), awaiting further instructions.

When the next keystroke is detected (block 1165, FIG. 11B), the programagain tests to see which of keys 405, 410, 415, and 420 was pressed. IfSTART key 420 is detected (block 1170) at this point, this keystroke isignored, since it is not a usable instruction. The program then waitsfor another keystroke (block 1165). If the next keystroke is fromup-arrow key 405 (block 1175), then the number of toys is incremented(block 1180) and displayed on display 220 (block 1185). The program thenwaits for another keystroke (block 1165). If the next keystroke is fromdown-arrow key 410 (block 1190), then the number of toys is decremented(block 1195) and displayed on display 220 (block 1200). The program thenwaits for another keystroke (block 1165). In incrementing # TOYS, theprogram rolls over from six toys to one. In decrementing # TOYS, theprogram rolls under from one toy to six, as described above.

After the desired number of toys is displayed, the user presses ENTERkey 415. Again, if a keystroke is detected (block 1165), but none isfound, an error condition exists (block 1210), and program executionreturns to BEGIN (block 1100).

The next step is to enter the overall time for all dispensations. Whenthe next keystroke is detected (block 1215, FIG. 11C), it is decoded asbefore. A START key-press is ignored at this point, since it is againnot a usable instruction. Pressing up-arrow key 405 (block 1225)increments (block 1230) and displays (block 1235) the first time value.Pressing down-arrow key 410 (block 1240) decrements (block 1245) anddisplays (block 1250) the first time value. Pressing and decoding ENTERkey 415 (block 1255) causes the program to advance to the nextstep—waiting for another keystroke.

At this point, randomly distributed dispensation times are generated(block 1265, FIG. 11D), as follows:

Step 1: A fixed time interval is calculated by dividing the overall timeentered above by the total number of toys entered above. For example, ifthe pet will be alone for six hours and the system contains six toys,the time interval is one hour.

Step 2. A random number generator, well known to those skilled in theart of computer programming, is used to generate one random numberbetween zero and one for each toy. These are RND₁, . . . , RND_(N). Forexample for six toys, RND₁=0.20, RND₂=0.35, RND₃=0.70, RND₄=1.00,RND₅=0.00, RND₆=0.64. As an alternative to a random number generator, anarray (not shown) of numbers between zero and one can be stored inmemory of a microprocessor 315, the array being a large set of numbers,for example two-hundred numbers, which can be used sequentially asrequired. Eventually, the set of numbers will be exhausted, at whichpoint the array recycles and numbers are again selected from thebeginning of the array. Any repetitions in program dispensations wouldbe well spaced, for example more than 30 programs apart, effectivelyprecluding memorization of any given program sequence by the pet.

Step 3. Beginning when the user presses “START” (block 1263), toys willbe dispensed at times T₁, . . . , T₆, measured from when the userpresses the START key 420 and determined according to the followingformula:

T _(N)=(N−1)(Interval)+(RND_(N))(Interval).

Thus:

T₁=(0)(1)+(0.20)(1)=0.2 hour

T₂=(1)(1)+(0.35)(1)=1.35 hours

T₃=(2)(1)+(0.70)(1)=2.7 hours

T₄=(3)(1)+(1.00)(1)=4.00 hours

T₅=(4)(1)+(0.00)(1)=4.00 hours

T₆=(5)(1)+(0.64)(1)=5.64 hours

Note that because the generation of random numbers is biased towardselecting “1.00” and “0.00”, occasionally a jackpot results in which twotoys are dispensed at the same time. In the example above, toy 4 and toy5 are scheduled to dispense at the same time.

System 200 now expects a START command. If any key other than START 420is pressed (block 1263, FIG. 11D), program control returns to BEGIN(block 1100). If START key 420 is pressed, then a time counter (notshown) increments and displays the time which has elapsed since thepressing of START key 420. The program selects the first value from thearray of time values calculated above and waits (block 1280) until thecurrent time equals the first time value.

When the time value equals the time interval since pressing START key420, a toy 100 is dispensed. Motor 324 (FIG. 3) is activated for a timesufficient to advance belt 340 a distance sufficient to tilt tray 330enough to cause toy 100 to roll or tumble down ramp 225. At this time,speaker 320 can emit sounds, odor generator 327 can emit odors, lightsource 325 can emit light or project an image, and vibrator 328 canvibrate. All of these supplementary stimuli are used to entertain thepet.

After the first toy 100 is dispensed, the TOY # is incremented anddisplayed (block 1290) on display 220. The program then checks to see ifthe last of toys 100 has been dispensed. The number of the current toy100 to be dispensed is compared with the number entered above. If thelast toy has not been dispensed, the program returns to block 1275 tocontinue the dispensing and stimulating process. When two dispensingtimes are equal, one toy is dispensed immediately following the previousdispensed toy, resulting in a jackpot. If the last toy has beendispensed, program control goes to block 1264 and then returns to BEGIN(block 1100) and the dispensing and stimulating process terminates.

Conclusion, Ramifications, and Scope

Accordingly the reader will see that, according to the invention, I haveprovided a superior dispenser for a pet toy. The novel dispenser usesrandomized or predetermined intervals in dispensing toys, andaccompanies the toys with a variety of stimuli, including sound,vibrations, light, and odors. A pet cannot memorize the randomizedintervals and become habituated to the dispensation events. Thus the petwill remain interested between events. Interest is increased furtherwith the addition of the occasional jackpot in which multiple toys aredispensed at a particular dispensation event.

Alternatively, the pet's behavior can be modified through controlledtiming of dispensations. Predetermined intervals are biased such thatthe dispensations occur more frequently after the owner leaves andbefore the owner returns, when a pet's separation anxiety is thehighest. This has the effect of mitigating separation anxiety andproviding alternatives to destructive behaviors at the times when thepet's anxiety is the strongest.

While the above description contains many specificities, these shouldnot be construed as limitations on the scope of the invention, but asexemplifications of the presently preferred embodiments thereof. Manyother ramifications and variations are possible within the teachings ofthe invention. For example, the dispensing system can dispense toys thatcontain medications that the animal must consume in order to reach thefood treat inside the toy. Although the embodiment shown dispenses sixtoys, other embodiments can dispense more or fewer toys. The systemframe and cover can be made of sheet metal, plastic, or wood, or acombination of materials. The system can be made to attach to a tabletopto discourage pets from digging into the area where the toys are stagedprior to dispensing. It can be for non-canine pets, such as felines,horses, apes, and the like. The time intervals given are exemplary andcan be changed to much shorter or longer intervals, even days or weeksif the pet owner is to be away on a trip. The dispenser can dispenseindividual pieces of food, without an accompanying toy. The toys can bewithout a comestible and/or can be varied in shape and operation fromthe exemplary toy shown. For example, the toy may be spherical, cubical,or bone-shaped with suitable food apertures. Thus the scope of theinvention should be determined by the appended claims and their legalequivalents, and not by the examples given.

We claim:
 1. A method of dispensing pet treats from a containerincluding a microprocessor and an input device at a plurality ofselected times during a predetermined period, comprising the steps of:inputting the predetermined period into the microprocessor using theinput device; calculating, through the use of the microprocessor, aschedule to dispense pet treats during the predetermined periodconstituting a first terminal interval, a second terminal interval, andat least one middle interval provided between said first and secondterminal intervals, said schedule allowing the dispensing of at leastone pet treat at the end of said first terminal interval and at leastone pet treat at the beginning of said second terminal interval, for thepurpose of modifying the behavior of a pet, wherein at least one of saidterminal intervals is always less than the average time duration of allof said intervals; and dispensing said pet treats according to saidschedule.
 2. The method of claim 1 wherein said pet treats are petcomestibles.
 3. The method of claim 1 wherein said pet treats are pettoys.
 4. The method of claim 3 wherein said pet toys each contain a petcomestible.
 5. The method of claim 1 wherein a plurality of said pettreats are dispensed at any one time.